look at that bite mark? that young man is lucky he didn t lose that leg. a lot of people aren t quite that lucky. we have people that have been bitten and lost limbs. nine attacks off the coast of north carolina. this holiday weekend, going into the fourth of july weekend, a lot of people want to hit the beach in north carolina and south carolina. instead, they are facing this. a lot of people are brave and going to go in anyway. i imagine that the people who make their living off these beaches this time of year are completely worried this is going to kill their businesses during this holiday weekend. they expect a lot of money. look at that. june 27 june 26 july 1, june 24 june 14 june 11 june 30. all along the map along north carolina and south carolina. you have to wonder why aren t
look at that picture. look at that bite mark? that young man is lucky he didn t lose that leg. a lot of people aren t quite that lucky. we have people that have been bitten and lost limbs. nine attacks off the coast of north carolina. this holiday weekend, going into the fourth of july weekend, a lot of people want to hit the beach in north carolina and south carolina. instead, they are facing this. a lot of people are brave and going to go in anyway. i imagine that the people who make their living off these beaches this time of year are completely worried this is going to kill their businesses during this holiday weekend. they expect a lot of money. look at that. june 27 june 26 july 1, june 24 june 14 june 11 june 30. all along the map along north carolina and south carolina. you have to wonder why aren t
actually play in identifying this man? cnn s alexandra field visits an evidence lab to learn how authorities were able to find wint with a pizza. reporter: it s potentially the smoking gun, a pizza box found at the scene. inside crust that investigators say connects daron wint to a heinous crime. this is a good find for an investigator. exactly, yeah. reporter: dr. david zang runs a dna identification lab in new york city. he says a single bite mark can be enough to crack a case. swab the pizza to get as much dna from the crust as we can. reporter: he says investigators also likely tested a crumb. put it in the tube. get the cells out and proceed to the dna extraction. reporter: first, a machine separates out the dna. purifying the dna. reporter: then the sample is amplified. millions of copies are made that make the sample large enough to
identification lab at mount sinai hospital in new york city. a single bite mark can be enough to crack a case. swab the pizza to get as much dna from the crust. reporter: investigators lightly tested a crumb. first a machine separates out the dna. then the sample is amplified. millions of copies made to make the sample large enough to be seen with the help of another machine. it s called a dna fingerprint. to solve the case that finger sprint can be added to or matched in a federal data base including some 14 million different profiles. hair saliva urine.
he says a i thinkle bite mark can be enough to crack a case. swab the pizza to get as much dna from the crust as we can. reporter: investigators likely tested a crumb. put it in a tube. get the cells out and proceed to dna extraction. reporter: first, a machine separates out the dna. this is releasing the dna? and purify the dna. reporter: then the safrple is amplified, millions of cop police made that make the sample large enough to be seen with the help of another machine. thely as wore trace the dna and that s what you re going to see here. reporter: it s a unique readout called a dna fingerprint. to solve the case the finger print can be added to or matched in the database including you 14,000 different profiles. hair saliva urine, semen, all can be used. reporter: seemingly small clues picked up at crime scenes a piece of crust can yield